Cherished for sports and wildlife applications, the EF 600mm f/4L IS III USM is a Canon L-series super telephoto lens distinguished by its advanced, lightweight design, quick and intuitive handling, and high speed performance. Using fluorite, Super UD, and aspherical elements, both chromatic and spherical aberrations are kept to minimum in order to realize sharp, clear image quality with accurate rendering and color fidelity. Both Super Spectra and Air Sphere Coatings also contribute to color accuracy and helps to control flare and ghosting when working in backlit and harsh lighting conditions. In addition to its optical merits, the 600mm f/4 is also characterized by its advanced five stop-effective Image Stabilizer system, which has three separate stabilization modes to suit various shooting applications. Also complementing handling is a sophisticated ring-type USM, which provides quick, quiet, and accurate autofocus performance along with full-time manual focus override. A customizable electronic focusing ring further contributes to precise manual focus control, by affording three focusing sensitivity levels for different applications. Manufacturer Included Items: Canon EF 600mm f/4L IS III USM Lens, Canon E-185C Lens Cap, Canon Lens Dust Cap E (Rear Lens Cap), Canon ET-160 (WIII) Lens Hood, Soft Lens Case Bundle Items Include:1 x Canon EF 600mm f/4L IS III USM Lens2 x 32GB SDHC Memory Card1 x Lens Cleaning Solution1 x Cleaning Cloth1 x Dust Blower1 x Lens Pen